Can I learn wind reading at 100y w/22RF?

[InTheBlack]

Reading the wind for high power rifle consists of learning the visible characteristics of mirage and movement of vegetation. I have Owens' three booklets, but can one learn what the wind looks like at 200, 300 and 600 yards by practicing looking at a target only 100 yards (or closer)?

If so, then does a 22RF respond to wind at 100 yards in a way that is proportional to a high power cartridge at any of the match ranges? Maybe if you choose the right velocity ammo & shoot at the right distance?

Right now I have the Black Hills remanufactured 68 grain ammo for my AR; their website isn't working for me so if anyone has their phone number I need to call for their ballistic data.

My ballistic program seems to give funky drift results; the distances are the same as the drop distances. Maybe that's why its shareware...

I found one 22RF chart on the net which shows about 4.3 inches at 100 yards for 40 grains at 1260 fps with a BC of 1.34.

I'm trying to compile ballistic data for the 22RF ammo I can get from the CMP. They gave me the velocities, but I have to ask the manufacturer for the BCs. I only have the data for Remington so far.

A year or two ago the CMP had Remington HV in the green & yellow box; I don't know what their NLU number was on that. I have some of that, as well as the Fed Gold Match and the (Olin) white box. If anyone has the BC data for those please post it.

I also have Remington Sub-Sonic; that is a 38 gr at 1050 fps.

The Remington web site lists "Golden Bullet HV, 40 gr" at 1255 fps; is that the green/yellow box???

BC DATA FROM REMINGTON:
Use .138 for the 40 grain round nose High Velocity
Use .149 for target
Use .124 for the standard Hollow points
Use .106 for the Yellow Jacket
Use .117 for Viper

These are corrected for the standard G1 drag factor. We use a G79 drag factor in our calculations, but most programs don‚t have this option.
***

CMP 22RF AMMO DETAILS:

NLU 403C- 40gr. solid lead, muzzle velocity 1260fps.
NLU 450- 40gr. solid lead, muzzle velocity 1360fps.

Federal .22LR (711B) NLU 451- 40gr. solid lead, muzzle velocity 1080fps., loaded to closer spec.
tolerance.

T-22 and Olin white box, basically the same one is under a government
contract (white box) and the other was purchased by the government, both
manufactured by Winchester/Olin. Both are solid lead, muzzle velocity
standard (1050 fps.).
***

 

[Steve Smith]

When I lucked out on my .22RF CLE upper I talked to a lot of guys with them and they advised that with certain ammo the wind was VERY similar at 100 at it is for a .223 with 80 SMKs at 600. Your 68s are much more wind sensitive compared to an 80 so theoretically a good .22 at 100 will drift less than a 68 at 600. I have been shooting my upper at the OTC so that's indoors 50 Meters. I haven't put this .22RF at 100/.223 80 at 600 comparison to the test but I can trust the guys who have. The ammo we all use is Wolf Match Extra. The Match Target is close, but I can see the difference at 50M so I'm sure you'd see the difference at 100 yards. After seeing what the WME will do on a Smallbore target at 50M, I know it can clean the Highpower 100 yard reduced targets.

Make sure you have a very accurate rifle and ammo.

 

[InTheBlack]

Today I used Federal Gold Medal Target (fancy name for 711B) 22RF at 100 yards and I needed 4 minutes of elevation for a 6 o-clock hold. Well I guess that really is relative to how high your front sight is; so to put it another way I needed 1.5 inches up from my 25 yard COM zero at 2.5 inches from bottomed out.

But of course at 25 yards the black is only the size of a quarter, so I don't quite understand why the total come up seems a bit small.

When the wind kicked up (gusts up to maybe 18 mph) it drifted from 1-3 inches. Conveniently it was a full value wind from 9 o-clock.

Load No. Type Grains Style Caliber Muzzle 25Yd 50Yd 75Yd 100Yd
Velocity in Feet Per Second (to nearest 10 fps)
711B Target 40 Solid 22LongRifle 1080 1030 1000 960 930

Wind Drift in Inches (10 MPH Crosswind)
711B na 0.3 1.0 2.2 3.9

Height of bullet trajectory above or below line of sight if zeroed at 50 yards.
Sights 1.5" above bore line (avg. range)
711B na +0.3 zero -2.4 -7.2